Practical Security Analysis of Dirty Paper Trellis Watermarking

Patrick Bas (1) , Gwenaël Doërr (2)

1 GIPSA-C2S - GIPSA - Communication, Signal et Sécurité
2 UCL - University College of London [London]

This paper analyses the security of dirty paper trellis (DPT) watermarking schemes which use both informed coding and informed em- bedding. After recalling the principles of message embedding with DPT watermarking, the secret parameters of the scheme are highlighted. The security weaknesses of DPT watermarking are then presented: in the wa- termarked contents only attack (WOA) setup, the watermarked data-set exhibits clusters corresponding to the different patterns attached to the arcs of the trellis. The K-means clustering algorithm is used to estimate these patterns and a co-occurrence analysis is performed to retrieve the connectivity of the trellis. Experimental results demonstrate that it is possible to accurately estimate the trellis configuration, which enables to perform attacks much more efficient than simple additive white Gaus- sian noise (AWGN).

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Patrick Bas, Gwenaël Doërr. Practical Security Analysis of Dirty Paper Trellis Watermarking. IH 2007 - Information Hiding: 9th International Workshop, Jun 2007, Saint-Malo, France. pp.396. ⟨hal-00166690⟩